diff --git a/isl.spec b/isl.spec
index 8859f93..563ddbe 100644
--- a/isl.spec
+++ b/isl.spec
@@ -16,7 +16,7 @@ URL: http://isl.gforge.inria.fr/
 #
 # % global buildid .local
 
-Release: 11%{?buildid}%{?dist}
+Release: 12%{?buildid}%{?dist}
 
 BuildRequires:  gcc
 BuildRequires: gmp-devel
@@ -108,6 +108,9 @@ cd isl-%{version}
 
 
 %changelog
+* Tue Jul 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 0.16.1-12
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
+
 * Wed Jul 22 2020 Tom Stellard <tstellar@redhat.com> - 0.16.1-11
 - Use make macros
 - https://fedoraproject.org/wiki/Changes/UseMakeBuildInstallMacro